How a quarry works
Earth's physical resources: rocks for roads - for iPod/iPhone
English - June 23, 2009 02:36 - 7 minutes - 37.9 MB VideoCourses Education Science nature street transport conservation recycle tonne concrete agriculture steel export Homepage Download Apple Podcasts Google Podcasts Overcast Castro Pocket Casts RSS feed
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Quarry managers explain how rock is formed and how they extract different layers of stone. Once blasted and processed, it is used to build roads.